Manual verification of employee digital certificate expiration dates

**Frontend (React + TypeScript + TailwindCSS):** A modular dashboard with three core views: - **Certificate Grid** (React Data Grid) for filtering/sorting certificates by issuer, type (e.g., S/MIME, TLS, code-signing), and expiration status. Uses `react-query` for real-time API polling (15-minute intervals) and `zod` for schema validation of parsed certificate data. - **Alerts Panel** (D3.js-based timeline) visualizing expiration thresholds (e.g., 30/60/90 days) with bulk-action buttons (e.g., `triggerRenewal()`) wired to a WebSocket-backed backend (`socket.io`). - **Audit Log** (TanStack Table) for immutable event history, with CSV/PDF exports via `SheetJS` and `pdf-lib`. **Backend (Python FastAPI + RQ for async tasks):** - **Ingestion Layer**: - **Email Parser**: Uses `imaplib` + `BeautifulSoup` to scrape structured data (e.g., `expires: 2025-12-01`) from vendor emails (e.g., DigiCert, Sectigo) via IMAP. Fallback to `spaCy` NLP for unstructured text. - **API Connector**: Dynamic issuer adapters (e.g., `digicert.py`, `sectigo.py`) using OAuth2 (`authlib`) to fetch certificates via their APIs (e.g., DigiCert’s [Certificate Lifecycle Management API](https://docs.digicert.com/)). Cache responses in `Redis` (TTL: 24h). - **Core Logic**: - **Expiration Engine**: `cron`-triggered (via `APScheduler`) to compare `expiry_date` (ISO 8601) against thresholds, stored in `PostgreSQL` (with `pg_trgm` for fuzzy issuer matching). - **Renewal Workflow**: Dispatches renewal requests via issuer-specific APIs (e.g., Sectigo’s [Automation API](https://knowledge.sectigo.com/support/solution/E1000)) or generates Slack/Email tasks (via `python-slackclient`) for manual issuers. - **Security**: JWT auth (`PyJWT`) with role-based access (RBAC) via `FastAPI’s` `Depends`, and `SQLAlchemy` for session management. **Infrastructure**: - **Serverless Edge**: Deploy frontend on Vercel; backend on Fly.io (PostgreSQL + Redis included). Use `Cloudflare Workers` for email parsing to reduce server load. - **Libraries**: - **Parsing**: `cryptography` (for ASN.1 parsing of embedded certs in emails), `dateparser` (for extracting dates from text). - **Notifications**: `Twilio` (SMS) + `SendGrid` (Email) for multi-channel alerts. - **Compliance**: `python-jose` for generating audit-proof signed logs (JWS). **Data Flow**: 1. Ingestion → Normalize → Store (PostgreSQL). 2. Expiration Engine → Trigger Alerts → Notify Users. 3. Bulk Action → Dispatch Renewal → Log Outcome.

This tool **eliminates cognitive load** by: 1. **Automating Data Collection**: Replaces 2–4 hours/week of manual spreadsheet updates with zero-touch ingestion (email/API), reducing administrative overhead by **~80%** for teams with >20 certificates. 2. **Preventing Outages**: Proactive alerts (configurable to 60/30/7 days) ensure no certificate expires unnoticed, avoiding last-minute scrambles (e.g., SSL failures, email signing breaks). 3. **Reducing Server Costs**: Automated renewals via APIs cut the need for emergency reissuance (e.g., revoked certs cost ~$100–$300 each to replace). 4. **Enforcing Compliance**: Immutable audit logs replace ad-hoc notes in shared docs, simplifying SOX/GDPR audits by providing timestamped, exportable proof of certificate lifecycle actions. 5. **Scaling Security**: Role-based access replaces insecure shared spreadsheets, ensuring only authorized admins can trigger renewals or view sensitive data (e.g., private keys in CSRs). For SMBs, the value is **time saved** (no more chasing vendors for renewals) and **risk reduced** (no expired certs disrupting business). For enterprises, it’s **cost efficiency** (no per-issuer tool licenses) and **operational resilience** (centralized visibility).